reagují
Reagují is a Czech verb form meaning "they react" or "they respond." It is the third-person plural present tense of reagovat, used when the subject is plural and the action takes place in the present.
In present tense, the verb conjugates as follows: já reaguji; ty reaguješ; on reaguje; my reagujeme; vy
Etymology and usage notes: reagovat is a borrowing from French réagir, meaning to react. The corresponding noun